Nosebleeds in summer may be caused by hot weather, which can easily lead to capillary rupture, or external forces leading to nasal mucous membrane damage, as well as may be suffering from blood system disorders and other reasons. Summer children often nosebleed, may be because the weather is relatively hot, and the child’s nasal cavity is relatively rich in local capillaries, the summer air is dry, through the nasal cavity is easy to nasal mucosa on the water to evaporate part of the nasal mucosa will become dry, blood vessels are also more prone to rupture leading to nosebleeds. In general, children’s nasal mucosa is very thin and easy to break. Summer may lead to dry nasal mucosa, the nasal cavity will appear itchy, mild pain, foreign body sensation and burning sensation, will make small children use their hands to dig or pick their noses, which will lead to nasal mucosa rupture, the symptoms of nosebleed. In addition, if they suffer from leukemia and other blood system diseases, it will cause coagulation dysfunction, which will also lead to nosebleeds. If a child experiences frequent nosebleeds, he or she should seek prompt medical attention and be treated under the guidance of a medical professional.